Elevator safety system



W. T. DUNFURD.

ELEVATOR SAFETY SYSTEM.

APPHCATIDN HLED AUG. 10, I914. 1,344,266. Patented June 22, 1920.

2 SHEETS SHHI l.

UNITED STATES PATENT OFFICE.

WILLIAM '1. DUNFORD, OF NEW YORK, N. Y., ASSIGNOR TO SHURLOC ELEVATOR. SAFETY 00., INC., A CORPORATION OF NEW YORK.

ELEVATOR SAFETY SYSTEM.

Specification of Letters Patent.

Patented June 22, 1920.

To all whom. it may concern Be it known that I, \ViLLIAM T. DUNFORD, residing at 364 \Vest 117th street, city, county, and State of New York, have invented certain new and useful Improvements in Elevator Safety Systems, of which the following is a specification.

The invention is an improved safety system for elevators, the general object being to provide a simple, compact and reliable construction and arrangement of parts on the car and at the several landings, whereby the car can be moved from a landing only in event of the door being locked. The invention more particularly comprises a construction and combination of parts enabling the door to be unlocked and the controller sinmltaneously rendered inoperative by a pedal on the car, and wherein the train of mechanism for locking the controller is mounted wholly on the car, thus permitting thc controller to be located in the most advantageous position, preferably at the side of the car, while. another train or branch transmits motion to a car contact by which the mechanism at each landing is operated to unlock the landing doors. The invention also comprises in such a construction means for engaging and'holding the car contact in its shifted position, thus holding the connected controller-locking mechanism against release. until the door in its closing movement disengages such means from the car contact. whereupon the car contact automatically returns to its original position. A further feature of the invention resides in the construction of the door-locking mechanism, whereby opening movement ol the doors is barred at two positions thereof, namely closed position and a position a predetermined distance therefrom, in conjunction with which provision means are provided whereby the detent for holding the car mechanism is released by the door as each locking position is reached. so that a quick start from the. landing can be effected, before the door has fully closed, without leaving the same in a condition permitting it lo be pushed open from the outside. The system is applicable to existing cars and controllers of different types. and other objects and features of the invention will be come apparent as the specification proceeds.

in thc :u-companying drawings illustrating the invention;

Figure 1 is a fragmentary perspective view of an elevator car, showing the car parts of the invention;

Fig. 2 is a fragmentary perspective view of a landing and a landing door, showing the landing mechanism in normal condition, that is to say, with tho..door closed and locked, the our contact being represented in dotted lines; Fig. 3 is a front clcvntion of the parts shown in Fig. 2;

Fig. is a view similar to Figv 3, showing the door partially open;

Fig. Ti is a vcrtical cross-section through Fig. d;

Fig. (3 is a detail elevation of the latch;

Fig. T is a side view of the lower part of Fig. (S;

Fig. 8 is a side view of the detent:

Fig. 9 is a plan view of the controller;

Fig. 10 is a detail view in vertical section taken at the pedal;

Fig. ll is a detail plan view of the switch;

Fig. 12 is a sectional detail view illustrat ing the locking devices at the controller; and.

Figs. 13 and 1-4 are detail perspective views of parts shown in Figs. 9 and ldach landing door, of which one is shown and dcsignatcd 2, is provided with :1 lock or catch, by which the door is automatically engaged at or beforc the conclusion of its closing movement, so that it cannot be opened from the outside. By locking is no meant necessarily that the door is hcld in movable. but that it is held against opening movement. Thus, as will presently be described. thc door at the first of its locking positions can be moved farther in the closin; direction but not beyond this position in the opening direction.

The. locking mechanism preferably comprises a horizontally extending bar or latch 3 pivoted at 4 on a vertical axis in :1 casing or rcccss 5 in the face of the shaft below the landing floor. suitable outwardly projecting contact member 6 is conncclcd to the latch 3 in an appropriate manner. being prefcrably mounted on a short arm 7 rigidly united with the latch and extending in the same dircctim'i from the pivot. The latch is urged outward by a spring -42 and is provided with two locking lugs H" and H spaced lengtlnvisc thereon for engagement with a suitable part on the door. such as an arm 1U projecting downward from the forward portion of the door and suitably formed lo clear the edge of thc landing and in operate is; the 7 the car. 111 the part shown the intermerhg the FHHHU lll'ltl win: when ni Flu extended sidewise b A In; {if the locking media, mi; in em side 8f the deer up the lrmer extremiiy uf the 1G and the two luckhag: lugs that the door may he lfirkizil 1g eh v:

ing movement when chased d fil 'l 2 predetermined distance m an 153 It will be understood l d-: wh n mg. first let-king Jug is reached in the (liaising movement the distance remain 1g; hetia'een the forward edgeef flu; leiof the deer opening sheuld E" to 'ermit a per-sen. t0 squeezethrough.

'l 'l is provided. with e c-entreller hand lever .13 W

vital axis 1%.

the side of th ieriding dour sh" A car cam it elengateri of the r lzmuntml in suitable liililfl car, at right angl i l8 leveled in the fi rem'eniently adjacent t5 the nperuU-r to g urcler to helm-l: v time actuetee a ham ear to lock the neutral position; this being i eeeupies when the cific?v arrangement a? varied; but in the prefe rrwk shaft 15) jnurnalvd in hm Yereely beneath the lemu!) whiter? lay the pedal we one and by an arm 2i, with 01' the PHl *"Ulllflit 15 and M, is provided with :1 s11 j: laur'imntul arm which cmmmris with imim' i (if a vertical inch. 1m! 23 hivwiing Hi4 maul Within rho cur l'n'hinel iw umiruilcr.

4 per-riwrl ill-ii .z Ew i (111M521 iwns l am the pedal. 1:. em; in l. him-L and (m tin m hand in *lm'i: ia'ig iildljlx w i'rmmw're V anemia-r in infill U'hlnw.

TREK" i3; lilnkiii m 115F115 inn win-sh 1!; The eye It "will ihw mi [in il l at 1' i' iehty pres 'ent the nyeration 0f the pedal 1%? 1m {he can contact In new of the fact that the enntmller lever 13 has a v-onsiih I le range of mm'ement, it is denlI'fllliU 1e '1' r i the engaging; yertien of the member "M ii the manner shown, so that the member is eminecteil with the lever only during a: limited e ent of its movement at each side at (ante i when the controller lever is mevm JUFOIHXI sush point, it leaves llifi member in z'liagonal pesitien in readiness to he engaged or the rewrse movement of the lever.

he controller may net unly be rendered A eiive by locking the lever in mid-p0- bltlbll hart also by the iiqiverafiion of a switch whiz-filling u rairmnuit at a point outside of Elli ci'mimiiz-r Till. rirruit preferably circuit, and is iii-ken by a part :mip-ins set in mohnn by the de m the pedal 18 in the particuwtiun shown, ell-mil. controlling n :ue provided at T8 in runnertion with Slide hair M5, the mmatrm-tiun being such that Tim?! this hair is in li'S rearward or non :mai pmitiun the var vireuit in ije-aitecl by the :mnhxeinrs eluted alt ilklh pfillil, while ihe bar is mm'eii l UlHEEI'il the cirit; lam] ill n. The vircuit mnimiling prrr else hr Si; if W11 {0 close the the item" lig it til simultane- 1 the lurking ml the mntroller breaking 01". the em circuit. han? with the imwtiun means mile for holding the var contact qua-ml the (-mitrnllei-ducking ism in their hlllfttll nr uhnormal p0- :rllxmm Stu-h IDEQHER may be widely varied, hut in the prof-31w? mustrlh-timz comprise 11 spring-urged (Ir-tum 32 nmll'ntml at the l'HHh H L iihin the wing .3. 1n the particui1! 1' em mlimrz1t 0i? ilw imenlimi illustrated mi elutmlt is :1 in i rank n'wmluer pivoted LE with in: um, gain 5%! adapted to prom; min the path ui' he clear part 10 and paw), him'i m1 its l j wer arm with :1 cenieal rnlw- 3E5 i' uhi in plat-e by :1 em -v; 310 21nd in engage :whmci, that at the an Mir ui' the m1 cuntzhbt if it serond i vii wank ulmiwnt I37 pivetml at 38 at a uric! from Hm element 3L mirresponding H'nximaivlv in Uh illhl HIlFQ between the ."iii; i lugs is pwviderl f0:- flm purpose of iii s the leer in fliflvng igg r (in (latent {M 1:2! wntrirt when the r le-01' in its mini-1mm hue rem-her! mapproxi- 1= r1 Lrruhwl the first lu pnsiiiun. T!"- ihis we! the upper arm 39 this hellriieps; aw? in the path 0 he part 10 in} V Wlilll the lower arm oi the detent. element by a pivotal link 4 The spring 41 which urges the detent to the left is shown ('t'illlltttQd at one end with this link and at the other end with a stationary abutment. serving it will be understood to give both the arms 31 and 21 a bias into the path of the part ll).

in operation. the operator stops the var opposite the landing by moving the eon.-

troller lever to mid-position. He then depresses the pedal 18, thereby projeetil'ig the rar cont-art 15 so as to press the landing contact (3 and latch 3 hark toward the wall of the shaft. This removes the looking lug 9 from in front of the door part 10, so that the door nary be opened by sliding it to the right. Simultaneously with the unloeking ot the door. the controller lever is loeked in its inoperative position by the raising of the rod :23 into engagement with the hole 27 in the member 24. At the outset of the opening; movement of the door the part it], whirh normally holds the upper arm of the detent. 32 down, as shown in Fig. 3. thus her-pine the engaging part of the latter out of aetion. rides off the said arm and permits the spring, at to move the detent into .holdinn relation with the rar eontaet. as shown in Fit-j. -l. The door-eemtrolletl detent is I'ims etlfertive while the ear is at the landing); to prevent unlocking of the rontroller white the door is open. The controller lever is therefore held lOt'hQll during the remainder ot the opening movement of the door, with the exception ot a momentary period near the beginning when the part 1*) rides over the arm 33 of the pivoted devioe :37. In prartiee, however, the operator keeps his foot on the pedal during the early part of the vdoor opening movement; and it' he should remove his foot the momentary disengagement ot' the detent 32 by reieas ing the rontaet Will. permit the uh I to he urged outward by its spring ii and thus tudm' the lug. S to stop the door. thus warniug the operator to hold the pedal down until this point is passed. The ('ontroller lever remains looked during the (losing movenwnt ol' the door up to the point when part to reenga ges the arm 39.. This disengaee the detent 32 from the on r roniaet and enalih's the operator to get a quirk start from the tloor while the door is vomplelin; its rlosine' niovenwnt; but. even should the door fail to rlose entirely. it rannot he pushed open beyond the limited distanee lined by the first lot-hing line 8. Ordinarily. however. the part ill will pass behind the semnd halting lug E) whirh holds the door rlost'd,

'lhe rar parts are returned to normal po sition by gravity. the rod 23 being suitiriently heavy for the purpose. but manit'rst y a spring may be provided to secure return. The war parts or met-hanism are seli'a'estorhw when freed from the re straint ot the detent so that it the operator takes his foot from the pedal nnder these mnnlii ions. the iiedal-operat'ed shoe will anti matirally return to its initial position. The lorkine' lugs 8 and 9 are beveled on their rear sides. as shown, so that in event ot the bar I5 being held forward by its spring when the door is rinsing the part it! is able to latrh by the lugs without hindranre. The beveling' oi the portion 35 of the detent I32 permits the ear contact 15 to latrh by it. in event of the detent being in the path of this rout-art when the latter is projerted outward; and being in the form ot a. roller it ledln'es l'rirtion in event of the ear rontaet being pushed against it while the ear is still moving.

Means are provided for reliably holding the rook member 21- in earh of the roelv'ed or extreme positions. in \l'lllt'l] it is tell by the level in the .latters outward exrursion. so that on the return movement the member will be properly rei ngaged by the lever in order to be rocked in the reverse dirertion. To this end the rook member or an element; thereon is adapted for sliding movement in addition to the rocking movement. for the purpose of engagement with and disengage,- ment from suitable roiiperativr means. urb as pins 53 and 54- projeeting upward from the controller easing at opposite sides of the ventral position of the rork member. The ('(Hlstl'llttlllll111d)lit('(HlSltlt'I2llIl varied. but as shown the element 52 is an elongated llillk'h' mounted slidably on top ol' the rork member and guided and retained by means,

of a srren 5:3 projertine' upward l'rom said member within a longitudinal slot as in the slide. and another srrew TIT projei-tinp downward iron: the slide through a slot in in lln= rot-k member. A spring {ii in the slot on, aiding against the srrew 5T. urges the slide forward: while a bead till on the rontroIlv-r lever is adapted to bear against the end of the slide to shift the same rearward against the artion oi' the spring. The parts are so arranged that when the roek member arrives at one ot its extreme positions. at or about the time when the lever moves away from it during: the remainder of the lever s out ward evrnrsion. the head of the Sl'l'LW ST is advain-ed by the pring 5. and at the outer side of the pin Iii). so that the latter blorlv's any return rocking movement of the mem her it until the lever is swnnfl arlv' again. pirlv'ing up the member and pressing the slide a: and srrew 5T rearward. The same aetion takes plare in respeet to the abutment 5 1. when the l'Ut'k nu-mber is lfitlflti to its other extreme position. The extent of ,l'tilliinn movement of the member is limiled by Screws iii and (3:2. n'hirh projert upward. at opposite sides oi the tail. piei'e Elf. lion! the Market 12; on v hirh the l'lllix' member is 'i nl liill vrismml. Thmc. fill-111M115, the" '0, 1 1

operate with h pi11 17?; 111ml 11 1 1111i the slid? 32 to lm'l: the rmrl; mumhur against 111"- cidt nuzl (llHPifitfiHhPilt in oithur 1li1 11vti1111 1 111 11 111 i prrtlrtvrrninml mukml pusltim 1. 1111111111111 11:, the 111111121 111i 11f thv lever lac ing 1 blu km! by the 11111 \vhvn til mnauliar lvW l is not in neat pnsit hnr it is 1105s hlu t 1111; i nj ury might re salt in wine 1;? the parts 111 connections in event ul 1 1111 being applied to the pedal nnilii-r sllcli tirrurn 11%?95. F111? this mas-011 :1 nm'nmlly -.-11:l ;1t1111 ;i11lly ri hl bpring is ins rtc l 11s 11 runnr-crtion betwe n the 111 1 1111 11ml 1.111 1.111113 operated thereby; 111111 in the 1111 11 111 11 cruistruutinn illustrated more 11111- tiuularly in Fig. 10 the pedal plunger is (Jumpnsml of relatively momhln p111 ha 11111 11 \Vll'it'll thu spring 73 111115 1111 1} 1111111121" 1111 15111 21111. lower part El 115 flu. pi

To this 1111i i111 1111 121 is mmle hullmv while from tilv lmltnn 1111* 01' funtpiere 11 11 1 LltflJUlHi :1 1111i :11- inn; 111 11 33 mlnptul 1L0 1 111.01 the inwa- 11111 sleeve (56 nncircle the 1 511110. 11 11 11111111111 the, spring is placed 11111 1 111 tin. raw 11;;"11111Pt 11 washer (17 he 111 11111 13111 huml thereof, and the screw thun flu-1 1111 1? into the button, which C(II'illi'lOhf the ,-;11i11;; at 1hr ther 01111. This unit cuns'trmn 151 11 it ihvn Hllllllt'il iiliu tvles opin rvlutiun i151 1111 11111 til, 11111 111 it supported 1111 1141" 111' the washvr 111 the luwm 11ml (1f the spring rwling on the 1111111 1 "111% of this part. ilw spring 11: thus r011 lined is 1111 ;?1 1 1 guiltvivzsi 1525 11 1 111' 13111111111 1111 i111 bi Dunstan tinlly imampreasihlu 1l111'i1'1; the 1101 11111] (.111- (ration 111" the. moyhaniwn,1111111 allmving: the grcwlzll =1 1111 31111 l'lw 1-111 shoe. li' hum-11311 the cnntiollvr lurking rml 53?) blocked lay tilt suli l 11111-1 (if thu tuilqaiera with which it 11151191111 5 (11 if nther obstacle is FEH'Ulilk tm'ml 111111 :1 1 11151 "1 11* clcgruo (11? 1111 1 5111111 is applied 11': tl11- pmlah the spring will lyluhi, Thus 111-1191 11111" 1311: 111(1l12111i11111 rum injury. The 15;.11'i11g5 1? asaiiutrs :1 thrust 00111111111611 lwtvcvml 1 111 111111011 3% {1111i the part 61, 11111] may h rcnlrweei with tl111 1111111111 withuut rt ilfl'hllll' 21 11.1111 301111111? -;1i1 11.

The mriirnlnr 130115 th n 11' the circui s mnirulling 1: 0am is 111,111 essential in the in-vmn'iun. hut that shuwn rrmuwlwl as 121 :-i111l,1l Th1: slide 11:11 16 prmiilfil at 011" 116M111 shlw with lllSHlltill 1101111111. platen 115 111111 TH, 11l111'l1 luv-:1 l11l111g3 0111 11111 11 with $1171ilgI-{ifl'lrlflll 1 1111111 Tl. .ml

swqumiily 1.111011. Vi lain the slide lmr is 111111121l inrwaul t0 project the 1111; mnhirt, this: cn-ndithjm reversed.

The internal uonstruc-tinn 11f thu 1-111 001 11114 1 1 :1111l the 11110111111 whereby it controls the npel'rtting rircruiti has not b01 11 illustrated, Him-e such matters are wvll lliltltl'htflfltl by 11111911 skilled in tin 2111'. Where in the 11p punelml r-laims parts are LlBSCIllJULl as heing :11 :1 landing it will he understand that :1, l0- rutiun inunmliutely at or below the landing H1111? 11 11. necessarily implied. but such ualiun that the parts are in operative reiatinn tn the. :11- W 11111 the latter is at the landing his the pfi ffirml emhodimgnt of the inventiun has l'fleen illustrated and drscribed in detail. 51- is recognized that 11111119111113 1:11:111. :Uni 111111lilicati1111s: maylm lm'isetl withmw drgmrting 1 1-11111 1111111111111 and an mmhngly the 111 vontion 111111 111 he limited 1:- thv prvcisre fmtnms 11f 1:011. ,;-|11'ti011 shemn.

hut chimed new is.

.l. 111 111.1 elevator safety sysic-m, the comhinaliun with 11 1:211", 11 mntruller lover there- 1111, and 11 landing (1001', sf means at the landing fur locking the landing door a peulul 11ml :1 thereby operable train of mevh- :mism 1111 the car mounted separately and independently of the controllor lever, mid train 11F mechanism including portions for lmlmliing the door-locking 111132.118 and fur lm-l-iing the cnntrnilcr law! in neutral 111191- tiun. 1111111118 mintroiied b the landing m fnr lwl ling Raid train of mecl11111i 111 in :11:- tusstwl mmlitinn only when the 1:111 :11; the landing and means whereby Sitlil mailmni mi autonnit'ically returns to 11111111111 131111- ilitiun when freed by Elm closing of tlw 111101 .1 the metraint of said holding 1110111111.

in 1111 elevatnr 5:1 fety 11311-111111 the 111111 '11i11111ir111 with 11 car, 11 mntrullur lover H1011:- 1 11. 1111i :1 lnmling (lnnr, 01. 1111121118 :it 1111. .lzi'fiiitiig 1513 1 lurking H11 lunch-11g 8111.11; 11 11159111] and :1 thin-thy npnml lu train at 1119121 11111111 1111 the 1:111 inmmtmi separately and 1'111l11p1111Gently 111. the mutroller E111" 1' $111111 11min of mechanism including portions for 111 1w. 111 the ilnurlocking 1111 11918 and for lurking: 113111 rm'itreller lvver' 11: 1 01151 .l pct sitiwn :1 mnrflhlc device at the hustling 111"- ml i 11 srmitroliml i the 1.!11111' 11ml 1.111 51] 1: l mism in airtiwtue'l lion when 311-12111 at 511 111111511 51ml 1111 1111 121111191,; mill :1 v. ,lnmimi 111-1. 1111i l'llll} 11 1111 111111111111111111 11111113111111 wlu-n from i {1" tho uzosinp; will the door frum tha': ruatrnint 11 :1 1'11l 1.110111l1l0 drvi in 3. in 1111 elevatvr f -1. 11 111111111. thn (11111- l1i11:11i 131 Wilh 1:111, 11 mnlmllwr lrvui 1111111'1--- lumiing doc-1', 11F 1111 11115 111 11111 11' inching tlm 1' .(ling "311111 1 1. 11min? 1111i 11 ll11 11-l 1 11111;. uninh- 1111121111 1111 H11 1111' 11 11111111 dependently of i the controller lever, said train of mechanism including portions for unlocking the door-locking means and for locking the controllcr levcr in neutral position, a movable positive holding device constructed and arranged to be controlled by the landing: door and to hold said train of mechanism in actuated condition only when the car is at the landing, and means whereby said mechanism automatically returns to normal condition when freed by the closing of the door from the restraint of said holding device.

4. In an elevator safety system, the combination with a car, a controller lever there on, and a landing door provided with a projection, of means at the landing for locking the landing door, a pedal and a thereby operable train of mechanism on the car mounted separately and independently of the controller lever, said train of mechanism including portions for unlocking the doorlocking means and for locking the controller lever in neutral position, a pivoted menu ber mounted at the landing and constructed to cooperate on the one hand with said door projection and on the other hand with the train of mechanism on the car so as to hold the latter in actuated condition while the door is open, and means whereby said mechanism automatically returns to normal condition when freed by the closing of the door from the restraint of said pivoted member.

5. In an elevator safety system, the com-- bination with a car, a controller lever thereon, and a landing door provided with a projection, of means at the landing for locking the landing door, a pedal and a thereby operable train of mechanism on the car mounted separately and indepemlcntly of the coin ,trollcr lever, said train of mechanism comprising branches terminating, respectively, in an externa shoe for unlocking the doorloeking' mech.nism and in a controller le ver locking el tnent, the latter normally sc arate from said lever, a movable holding device at the landing arranged to be controlled by the door projection and to hold the car shoe and the connected train oi? mechanism in actuated condition while the door is open, and means whereby said mech anism automatically returns to normal conditiomwhen freed by the closing of the door from the restraint of said holding device.

ll. In an elevator safety system, the combination with a car, a controller lever thereon, and a landing door provided with a pro-- iection, of means at the landing for locking the landing door, a pedal and a thereby operable train of mechanism on the car mounted separately and independently oi the controller lever, said train of mechanism having two branches. one branch compris in; an external shoe for unlocking the door locking means and the other branch com prising an upwardly-acting controller lever locking: rod normally separate from the controller lever, a movable holding device at the landin; aranged to be controlled by the door projection and to hold the car shoe and the connected train of mechanism in actuated condition while the door is open, and means whereby aid mechanism automatically returns to normal condition when freed by the closing of the door from the restraint of said holding; device.

T. in an elevator safety system, the combination with a car, a controller lover thereon, and a landing door, oi means at the landing for locking the landing, door, a pedal and a thereby operable train of mechanism on the car mounted scpa 'alcly and independently of the controller lever, said train of mechanism comprising two branches, one branch terminating in an external shoe for unlocking the door-locking means and the other branch, which is normally separate From the controller lever, being constructed and arranged to lock the controller lever in neutral position and to prevent operation of the mechanism when the (ontroller lever is out ol neutral position, means controlled by the landing door for holding said train of mechanism in actuated condition only when the car is at the landing. and means whereby said meeba nism aulonmtically returns to normal condilion when freed by the Closing of the door from the restraint of said holding means.

8. in an elevator safety system, the conibination with a car, a controller lever thereon, and a landing door, of means at the landing for locking the landing door, a pedal, a train of mechanism on the car mounted separately and independently of the controller lever, a yielding connection, between the. pedal and said mechanism, said train of mechanism comprising branches terminating, respectively, in an external shoe for unlocking the door-locking; means and in a member constructed and arranged to Ioclc the controller lever in neutral position and to have its movement barred when the controller lever is out of neutral position. means controlled by the landing door for holding said train of mechanism in actuated condition only when the car is at the landing, and means whereby said mechanism automatically returns to normal condition when freed by the closing of the door from the restraint of said holding means.

9. in an elevator safety system, the combination with a landing dooi and a lock for the same. a car, and a controller located at one side oi the car, of a pedal on the car, a movable car shoe for unlocking the door loch, controllcrlocking means. connections beneath the car floor from the pedal to the. car shoe on the one hand and laterally and thence upwardly to tho control!er-locking means on the other hand, and a latent at the landing controlled by the door and adapted to hold the pcdal'o oerated instru mentalities in actuated condition whilo the door is unlocked.

it In an cle i'ator safety systcl'n, the 60111 hination with a landing door and a lock for the same, a car, and a controller, of a pedal on the car and car mechanism operable thereby, said mechanism including a shoe tor unlocking the door lock and means for locking the controller, the car HltC- ltlfllSHh and pedal heing separate from tho controh lcr. means for preventing thc opcration of said mechanism to I't'iPtH% thc tic-or incl: rcpt when the controller in nnd'position, and a detent at the landing controlled by the door and adapted to hold the pedal op grated instrlnncntalitics in tic-tinned condo tion \Tllilfi the door is unloch'e ll. In an elevator sair-ty cm, the conv hination with a landing door and hunting mechanism comprising a lock for the door and a contact movable to release the door lock, of a car, a cooperative contact on the car, a pedal connected therewith, a controller lever on the car. a member having moons of engagement with the controllor lever and mounted to he t-z'iched thcrchy about a with val axis, said member living pro iilcd with an owning, and an niu'ig ht rod hulow said mcin'er, the rod being ronncrtwl with the pedal and adapted to entcr said opening to lock the controller when the latter is in mid position.

152. In an elevator safcty systcni, the co1nhination with a landing door and landing mechanism comprising a nicchnniral lock for the door and at contact directly conncctoil with the door locl'o and movable to rclcaso the same, of :1 car, a cooperative content thcreon, a pedal for nic hanicnliy opvrating said coo erativo contact to unlock the land.- ing door, a cohtroller on the can a cdntrol circuit, a switch controlling tho same and a train of connectihns on the t r :twccn the pedal and said switch whcrcuy tho con:- trollcr is rendered inoperative by the dc pression of the pcilal to unlock the door, said train hcing free to return in normal position upon removal o th foot i 'ronl the pedal.

13. In an elevator safety system, the conihination with a landing door and a lock therefor, of a controller in tho car, car mechanism comprising a pedal on the cur separate from the controllcr. a contact carricd hy the car for unlocking the door lock, a controller lock normally separate from the controller, and mechanical LOIIIIFCtrlUIlS on the car from the pedal to said contact and controller lock, and a 'lctcnt adapted to engage and hold the car Contact in actuated position and to he discn aged 1) the door in closing, said car mec ianism eing, selfrestoring when freed from the restraint of said detent,

14. In an elevator safety system, the com hination of a landing door having a downward projection operative in tho gap between the car and landing, a door-locking nmmhor mounted on the face of the elevator shaft below the landing floor adapted to bar increment oft said projection, a car controlicr, pedal on the our separate from the controllcr, a contact carried by the car adapted to unlock the door-lock, a, device normally soparate from the controiler for locking the same, mechanical connections wholly on the car extending from said pedal to the car contact and to the controller-locking device, and an automatic s )ring-urged dctcnt or holdii'ag tho contact in actuatcd position, said dctcnt being adapted to be restored to normal position through the action of the door in closing and the car contact and therewith connected parts being adapted thereupon to return automatically to their normal positions.

15. An elevator safety system, com ,rising tho combination of a landing door ock, a car shoe movable to unlock the same, a controller lock normally separate from the con trollor, an operators device on the car Se a rate from the controller, connections etwcen the car shoe and controller lock, said connections being operated by the operators device to unlock the landing door and at the same time lock the controller and adapted to return automatically to initial position when permitted, the controller being normally o'crahlo without opcrating the car shoe, antl it springprcssed dotcnt at the landing constructed to engage directly with tho car shoe and thereby hold the same and the therewith-connected controller lock in the actuated condition while the door is open, the detent being shifted against the action of the spring by the door in closing to permit the restoration of the cor shoe and its conncctions on the car.

16. An clcvator safety system, comprising the combination of a lock at the landing for locking the landing door, said lock having a, ontort portion whorehy it may he un locked, a car shoe adapted to coact with said contact )ortion and movable to unlock the door inc a controller lock normally separate from the controller, an operators device on the car separate from the controller, connections whollyon the car between said shoe and controller lock and whereby hoth are operated by said 0 erators device, the controller being norma 1y operable without operating the our shoe or said connections. means for preventing the pro'oction of said shoe except when the control or is in midposition, and a deviee mounted at the landing in conjunction with the door loelt and controlled by the door wherehy the car shoe and controller lock are held in the aetuatod condition while the door is open.

17. An elevator safety system, eomprising the combination of a projecting iron on a landing door, a look at the landing for locking said door by barring movement of its projecting iron, said lock having a contaet portion whereby it may he unlocked, a air shoe adapted to (roar-t with said eontaet portion to unlock the door loek, a eontroller lock normally separate from the eontroller, an ope 'ators' derieo on the car separate from the controller. eonneetions wholly on the ear between said shoe and eont'roller loek and wherelry hoth are operated lay said ope ator s derive. means for proventinr the projection of said shoe. ext-opt when the eontroller is in n'iid position. the eontroller he ing normally operalile without operating: the ear shoe or said eonneetions. means or holding the ear shoe and therewitha'onneetml eontrollor loelc in the aetuated eondition to prevent starting ot the ear while the door is open. said means eomprising a nieniher mounted at the landing in eonjunetion with the door loelt to he engaged and operated hy said door-iron, and means wherehy the shoe and the therewith eonneeted parts on the car return to normal eondition when permitted.

18. An elevator safety system, comprising the eomhination iii a projecting iron on a. landin; door. a lork at the landing for lookin;: said door by harring movement of its projeeting iron. said l(n havinr a eontaet portion \vlierehv it may he lllllfitlfltl, a ear shoe adapted to eoaet with said eontaet portion to unloeh the door loelc. a eontroller lock normally separate from the controller. an operators deviee on the ear separate from tho eontroller, eonneetions wholly on the ear hetween said shoe and eontroller lUt'li and wherehy hoth. are operated liy said opera tors ileyire. means for preventinp the projeetion oi said shoe exeept when the eontroller is in mid-position. the eontroller hein normally operahle without operating the ear shoe or said eonnwtions. means for holding the ear shoe and therowitli eonneeted eonlroller loei; in the aeluated eondition to prevent starting oi the ray while the door is open. said means eomprising' a rorl: inenrher at the landing mounted to turn ahout a horh Zl'lltill a.\is perpendienlar to the tare ol' the shall and harin z' a portion to engage with lhe door-iron and another portion to ell'erl. the holding ol' the ear shoe. and means nhereliy the shoe and the therewith eon nerted parts on the ear return to'normal eon dilion when permitted.

i ln an elriatol sul ely system. the L'lllil hiuatioli ol a landing door hurling; a down ward projeetion operative in the gap he tween the ear and landing. a spring ur ri-d door-halting nieinher pivoted on a rertieal. axis on the l'aee oi the ehwator shalt helow the landing lloor and having a horizontally extending arin l'ormed with a plurality of locking lugs and loeated hetween the door projection and the fare of the shaft. and a eontact on the ear adapted to he proieeli l to press said locking memher haelnrard rel lively to the l'aee ot the shal't to release th door projection.

an. in an elevator safety system. the eom hinaiion with a landing door harinr: a downward proieetion operatiw in the gap hetween the ra and landing. a llat ase applied \ertieally to the tare ol' the elerator shalt helow the landing; lloor. a sprioy ioerd swinging; loelcing" niemher in said ease e tween the door projeetion and the l'are oi' the shalt. said loel in; memher harin' a horizontally exh-ndiio; portion pro with a plurality of lll 'hllhfi lugs. and a springairo'ed detent in the ease adapted to he aeied upon lry said door pioieetion. of a eontroller on the ear. :1 ltilli tor the eontroller. :1 ea r roinael adapted to he proieeted to press said lllt'lfiilril nieinher llaeltnard out ol' lot-king position and to he engaged and held hy said detenti. and a pedal on the eu! eonneeted to operate hoth said eontroller loeli' and said eontaet.

21. in an elevator sat ety syst m. the more hinalion ot a landing" door having a dome ward projeetion operative in the gap lit tween the ear and landing. a door-loel ing lnemlier pivoted on a rertieal on the axis tare ol' the shaft helow the landing lloor and having upper and lower arms e\teli1liiij laterally in the same direetion l'rorn the pie otal axis. one of said arms h inel'orni rl with a loeliing shoulder to hold said proie tion and the other arm ha ing a eonlaet poi" lion. a spring urging: said liuhliitf inrniher in a direetion away from the wall ot the shall. and a sllhi'eslorilnj pedalpperated on the ear adapted to he proireied against said eonlaet portion to pro lip looking arni out ol' engrrmnrenl with proiei'iion.

.312. in an eleralor sal'ely s int: door ha\ in; a part projwl lllL d n no rr-l therelronr. a horimiutally extending: lilwir mounted on the fare ol the shall i i on a \ei'lii'al a.\is and liming lo liiog l spared iillJllHllM thereon to retain the r on the door. and detent said l eli eonstrueted and al'l'nligod to la shifted to releasing po ilion liy aid d r proprtion when the latter rear-he the lilill its leuhiirg' posiliulls in the door I room-meld. in eoniliinalion with a ar hair=- a rontroller. and inerhani io on iln onlorltiogr the door lorli'in tin-iota r i. a lahil meehanism adiaw in aw. i

multaneonsly rendering said controller inoperative, said detect mechanism engaging a portion of the car mechanism to hold the same in shifted position while the door is open.

23. In an elevator safety system, a landing door, locking mechanism operative to hold the door against opening movement wheh closed and also when at a predatormined distance from closing, a contact con-- nected with said locking mechanism, mechanism on the car for rendering the car controller inoperative having connected therewith a contact to cooperate with the landing contact, and operators means for shifting said mechanisms so as to unlock the door and render the controller inoperative, in combination with a detent whereby the car mechanism is held in shifted position, and means whereby said car mechanism freed to restore control of the car to the operator when the landing door in closing reaches the first of its locking positions,

24. In an elevator safety system, a landing door, locking mechanism operative to hold the door against opening movement ,when closed and also when at a predeter mined distance from closing, and a contact connected with said locking mechanism, in combination with a car controller, means on the car to loci: the controller, a pedal on the car to operae said controller locking means, a car contact also connected with the pedal to operate the landing contact, a detcnt operative to hold said car contact in shifted position, and means for disengaging said detent when the first locking position is reached in the closin of the door.

25. In an elevator safety system, a landing door, locking mechanism operative to hold the door against opening movement when closed and also when at a predetermined distance from closing, and a contact connected with said locking mechanism, in combination with a car controller, means on the car to lock the controller, a pedal on the car to operate coi'itroller lockin means, a car contact also connected with the pedal to operate the landing contact, a detent operative to hold said car contact in shifted position, and means wh reby the door retracts said dctent approximately when the first locking position is reached and again when approximately closed.

26, In an elevator safety system, a landing door, locking mechanism operative to hold the door against opening movement when closed and also when at a predeter mined distance from closing, a contact connccted with said locking mechanism, a cooperative contact on the car, controller locking mechanism also on the car, and an operators device on the car for operating both the caricontact and the controller loclc ing mechanism, in combination with detent at the landing for engagement with the car contact, and means whereby the door retracts said detent approximately when the first locking position is reached and again when approximately closed.

27. In an elevator safety system, the combination with a landing door, means for locking the same in two positions, a car having a controller, and mechanism on the car whereby the operator ma unlock the landing door and simultaneous y efi'ect looking of. the controller, in combination with a detent for holding the car mechanism in shifted condition, and members spaced correspondingly to the locking positions of the door and adapted to be engaged successively by a part on the door to retract the detent.

28. In an elevator safety system, the com bination with a landing door, means for locking the same in two positions, a car having a controller, and mechanism on the car whereby the operator maynnlock the landing door and simultaneously effect locking of the controller, in combination with two spaced pivoted elements arranged to be engaged successively by a part on the door and having a connection between them whereby one moves the other, one of said elements having means to engage and hold a part of the car mechanism in shifted position.

:29. In an elevator safety hination with a landing locking the same in two positions, a car having a controller, and mechanism on the car whereby the operator may unlock the landing door and simultaneously effect locking of the controller, in combination with two spaced bell-crank elements connected by a link and adapted to be engaged successively by a part on the door, one of said elements having a portion to engage and hold a part of the car mechanism in shifted position.

30; In an elevator safety system, the combination with a landing door, means for locking the same in two positions, a car having a controller, and mechanism on the car whereby the operator may unlock the landing door and simultaneously effect looking of the controller, in combination with dctent mechanism comprising a portion adapted to engage a part of the car mocha nism to hold the same shifted, said portion having a beveled face to permit said part to latch by the same, and members connected with each other and adapted to be engaged successively by a part on the door to dis engage the detent portion.

31. In an elevator safety system, the combination with a landing door, means for locking the same in two positions, a car having a controller, and mechanism on the car whereby the operator may unlock the landing dooran'd simultaneously effect lock ing of the controller, in combination with system, the comdoor, means for detent mechanism comprising an element having a beveled member mounted rotatably thereon to engage behind a part of the car mecl'ianism and to permit the same to latch by it, and a second element spaced from and connected with the first, said elements being adapted to be engaged successively by a part on the door to disengage said beveled member from the part on the car.

32. In an elevator safety system, a landing door having a part projecting downward therefrom, a horizontally extending latch mounted on the face of the shaft to swing on a vertical axis and having locking lugs spaced lengthwise thereon to retain the part on the door, and horizontally spaced pivoted devices arranged to be engaged successively by said part, in combination with a car having a controller, and mechanism on the car for retracting the latch and simultancously rendering said controller inoperative, one of said pivoted devices being a detent adapted to engage and hold a part of said car mechanism in shifted position. a

33. In an elevator safety system, a landing door having a projection, a locking device having horizontally spaced lugs cooperative with said projection, a car having a control; ler, mechanism on the car for retracting said locking device and simultaneously render ing the controller inoperative, and detent means adapted to engage and hold a part of said car mechanism in shifted position and having portions arranged to be actuated successively by the door in closing to disengage the detent.

34. In an elevator safety system, a landing door having a part projecting therefrom, a locking device having longitudinally spaced locking portions cooperative wit said projection, mechanism on the car capable of actuation by the operator to retract said loc king device and simultaneously render the controller inoperative, and detent means on the landing adapted to enga e' and hold a part of said car mechanism in sliifted position and having. ortions arranged to be actuated successive y by said pro ecting door part in closing to disengage the detent.

35. In an elevator safety system, the combination with mechanism at a landing including a. contact, of a car having a controller lever, a contact on the car cooperativewith the landing contact, a rock member having a forked portion adapted to be' engaged by said lever to rock the member in one direction or the other according to the direction of movement of the lever, means connected with the car contact and adapted to engage said rock member to lock the same and the controller lever central, and means for holding said member against displacement in either direction when in its extreme positions. a

36 in an elevator'fsafety system, the combination with a" controller lover, of a'rock member having a forked portion projecting into the path of the lever whereby the member is adapted to be rocked reversely by the respective back and forth movements of the lever, and means whereb said member is locked in each of its roclied positions and unlocked by the action of the lever.

37. ln an elevator safety system, the combination with a controller lever, of a rock member adapted to be engaged and moved by the controller lever in one direction or the other according to the direction of movement of the lever, an element movable on said member under the control of the controllcr lever, and means cooperative with said element to hold the rock member against displacement in either direction in ea h of its rocked positions.

38. In an elevator safety system, the combination with a controller lever, of a rock member adapted to be engaged and moved by the controller lever in one direction or the other according to the direction of movement of the lever, an element mounted slidably on said rock member, stationary abntments adapted to coiiperate with said element to retain the rock member in each of its extreme positions, a 5 ring for urging said element to engage sai abutments, the slide beirig arranged to be disengaged therefrom by the action of the controller.

39. In an elevator safety system, the combination with a controller lever, of a rock member adapted to be engaged and moved by the controller lever in one direction or the other according to the direction of movement of the lever, means cooperative with said rock member to lock the controller lever in mid-position, and means for locking said member against displacement when in its extreme positions disengaged from the lever, the said means comprising, a spring-pressed element on said rock member, and cooperative means mounted on a. suitable stationary part, said element ongaging automatically with said cooperative means when the lever leaves the rock member and being disengaged by the latter in its return movement picks up the rock member.

40. In an elevator safety system, the combination with a landing door, a lock therefor, and a contact at the landing for re leasing said lock, of a car having a controller lever, means for locking said controller lever in neutral position, a contact on the car movable to actuate the landing contact, an operators device on the car, an connections whereby'said device 0 crates both the car contact means, said lever locking means being adapted to block actuation of said connections when the controller lever is out of neutral position, and said connections including a the lever when and 'ti le jlever coking normally substantially rigid spring adapted to yield in event of operation of the operators device when the connections are blocked.

41. In an elevator safet system, the COIll bination with a landing nor, a lock there for, an elevator car having a controller lever, and a lock for said lever, of a pedal on the car for releasing the door lock and applying the lever lock, said pedal having a plunger composed of parts movable relatively to each other, and a normally substantially rigid spring confined as a connection between said parts.

42. In an elevator safety system, comprising suitable mechanism on a car, a pedal for operating said mechanism having, in combination with a lower part, a removable upper part comprising a foot piece, a spring, and a member secured to the footpiece and cooperating therewith to confine the spring to the foot piece, said spring being arranged to be compressed be tween the foot-piece and the lower part by pressure applied to the former.

43. In an elevator safetv system, the combination with a door at a anding and a controller in the car, of means for locking the door when Within a predetermined distance of closing, means for locking the controller, foot-operated mechanism 'on the car for unlocking the door lock and locking the controller lock, and means whereby the door in closing unlocks the controller approximately at such predetermined distance.

44. In an elevator safety system, the combination of a door at .a landing, means for locking the door in closed position and at a predetermined distance from closing, a controller in the car, means for locking the controller, and mechanism partly on the car and partly at the landing and including an operating pedal on the car whereby the con troller is locked when the door is unlocked and vice-versa.

In testimony whereof, I have signed my name to this specification in the presence of two subscribing witnesses.

WILLIAM T. DUNFUHD.

"itnesses EDWARD I. IIOPKINS, J. SIIANDENBURG. 

